EP 3190393 A1 20170712 - EMISSION FLOW RATE MEASURING METHOD AND APPARATUS
Title (en)
EMISSION FLOW RATE MEASURING METHOD AND APPARATUS
Title (de)
EMISSIONSDURCHFLUSSRATENMESSVERFAHREN UND -VORRICHTUNG
Title (fr)
PROCÉDÉ ET APPAREIL DE MESURE DE DÉBIT D'ÉMISSION
Publication
Application
Priority
- JP 2003294239 A 20030818
- JP 2003355690 A 20031015
- EP 07002436 A 20040816
- EP 04019438 A 20040816
Abstract (en)
The invention presents a differential pressure type emission flow rate measuring method and apparatus and an emission measuring system using the same apparatus, capable of correcting measuring error occurring due to pulsation appropriately and enhancing the measuring precision of flow rate when measuring the flow rate of emission having pulsation. The invention, in measuring the flow rate of an emission exhausted from an engine, determines an accurate flow rate in spite of pulsation by using a differential pressure type flowmeter as the flowmeter, resolving the detected differential pressure signal by frequency, and correcting by using a correction coefficient predetermined depending on each frequency obtained by frequency resolution.
IPC 8 full level
G01F 1/34 (2006.01); G01F 1/46 (2006.01); G01F 1/50 (2006.01); G01F 1/72 (2006.01)
CPC (source: EP US)
G01F 1/34 (2013.01 - EP US); G01F 1/46 (2013.01 - EP US); G01F 1/50 (2013.01 - EP US); G01F 1/72 (2013.01 - EP)
Citation (applicant)
- JP H10318810 A 19981204 - TOYOTA MOTOR CORP
- JP 2000046612 A 20000218 - AGENCY IND SCIENCE TECHN
- JP 2001208584 A 20010803 - NAT INST OF ADVANCED IND SCIEN, et al
Citation (search report)
- [XYI] WO 9711336 A1 19970327 - SCOTT FETZER COMPANY INC [US]
- [XYI] US 5493512 A 19960220 - PEUBE JEAN-LAURENT [FR], et al
- [X] US 4796651 A 19890110 - GINN LEROY D [US], et al
- [Y] US 5086655 A 19920211 - FREDERICKS GEORGE E [AT], et al
- [Y] US 6543293 B1 20030408 - KURTZ ANTHONY D [US], et al
- [YD] JP H10318810 A 19981204 - TOYOTA MOTOR CORP
- [Y] EP 0672893 A2 19950920 - CURTIN MATHESON SCIENT INC [US]
- [Y] EP 0255056 A2 19880203 - YAMATAKE HONEYWELL CO LTD [JP]
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 1508788 A1 20050223; EP 1508788 B1 20070214; DE 07002436 T1 20181018; DE 17157248 T1 20181004; DE 602004004709 D1 20070329; DE 602004004709 T2 20071122; EP 1793210 A2 20070606; EP 1793210 A3 20070808; EP 3190393 A1 20170712; US 2005080550 A1 20050414; US 7110878 B2 20060919
DOCDB simple family (application)
EP 04019438 A 20040816; DE 07002436 T 20040816; DE 17157248 T 20040816; DE 602004004709 T 20040816; EP 07002436 A 20040816; EP 17157248 A 20040816; US 91992504 A 20040817